to the crisis now in syria. there are growing fears this morning that as opposition forces advance, a desperate assad regime may consider using chemical weapons. as events on the ground pick up speed so do diplomatic efforts. susan mcginnis has details on a high level meeting between the u.s. and russia. susan, good morning to you. >> reporter: good morning. intelligence reports are suggesting as this regime gets closer to falling, syrian president, bashir al assad could release sirin gas on the people there to subdue the rebellion. this would be a new phase of the war. it has the u.s. uniting with russia to stop it and some here on capitol hill calling for u.s. military intervention. rockets streak across the syrian sky as the battle between rebel forces and troops move to outskirts of the capital of damascus. jeffrey white says it's only a matter time before the bloody civil war is over. >> you can feel it. you can sense it. looks like the regime is being defeated. >> reporter: intelligence officials say chemi